Usability is about making technology as easy as possible for everyone to use.
This section provides essays on various topics in usability.
For a quick introduction, read the Vision, which establishes the goals and rationale of usability (making technology humane, painless, and fun).
The essays in Usability Philosophy give the details on how usability ought to be practiced.

My Usability Story gives a brief biography of how my career in human-computer interaction has led up to this.